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1.
Based on the Social Representations Theory (SRT) applied to the social construction of risk and the role played by group identities, this study examines the construction of risk created by the mass media in health epidemics. An experimental design with split-ballot questionnaire and 319 participants was used in which message framing (human interest vs. attribution of responsibility) and proximity (high vs. low) were manipulated for a high invulnerability identity (youth) vs. a low invulnerability identity (elderly) population. Results showed that the human interest framing increased the perception of risk, especially when the proximity of the epidemic was high; this effect was explained by people’s emotional response. Furthermore, youth projected the risk towards ‘the other’ in order to protect their invulnerability identity. Finally, we stress the importance of the SRT on a theoretical and applied level for risk communication in health crises.  相似文献   
2.
Activity and species-specific responses of insectivorous bats in different urban-forest conditions provides a general perspective on the adaptability and vulnerability of bat species towards urbanization intensity. Here we evaluated species richness and activity patterns of aerial insectivorous bats across an urbanized landscape in the highlands of Chiapas, in Mexico. Acoustic monitoring of echolocation calls was conducted for 27 nights over a period of four months. Species richness and relative activity of insectivorous bats were estimated in a landscape with different conditions of urbanization intensity: urban areas, non-urban and forest areas. We identified a total of 14 bat species and three phonotypes. Bat species richness and relative activity was similar (X2 = 0.568, gl = 2, p > 0.05), but species composition differed among conditions. We observed a significant higher occurrence of Bauerus dubiaquercus, Eptesicus brasiliensis and Myotis californicus in forest sites. Urban sites presented higher occurrence of Molossus rufus and phonotype Molossidae 2, while non-urban sites presented a higher occurrence of Eptesicus furinalis and phonotype Molossidae 2. We were able to identify bat species according to their relative activity in relation todifferent landscape conditions. Species of the Molossidae family presented the highest activity in urban sites, which was positively affected by the number of streetlights, while species of the Vespertilionidae presented the highest activity in forest sites, which was positively related totree density. While urbanization tends to diminish native biodiversity and alter faunal communities, our results show a similar richness and relative activity of aerial insectivorous bats along the urban ecosystem. The effect of urbanization intensity becomes more apparent in species-specific bat activity; the response of species towards particular habitat conditions depends on local habitat quality and characteristics (i.e., presence of streetlights, vegetation cover and tree density).  相似文献   
3.
Strong formulation for the spot 5 daily photograph scheduling problem   总被引:2,自引:0,他引:2  
Earth observation satellites, such as the SPOT 5, take photographs of the earth according to consumers’ demands. Obtaining a good schedule for the photographs is a combinatorial optimization problem known in the literature as the daily photograph scheduling problem (DPSP). The DPSP consists of selecting a subset of photographs, from a set of candidates, to different cameras, maximizing a profit function and satisfying a large number of constraints. Commercial solvers, with standard integer programming formulations, are not able to solve some DPSP real instances available in the literature. In this paper we present a strengthened formulation for the DPSP, based on valid inequalities arising in node packing and 3-regular independence system polyhedra. This formulation was able, with a commercial solver, to solve to optimality all those instances in a short computation time.  相似文献   
4.
ABSTRACT

Child serving professionals need increased understanding of the identification and therapeutic needs of child victims of commercial sexual exploitation. This study evaluated the effectiveness of a training program aimed to increase awareness of commercial sexual exploitation of children (CSEC) among professionals likely to encounter victims in their work. Professionals’ (N = 227) knowledge level was examined prior to the training, immediately thereafter, and in a 6–12 month follow-up. Despite professional position or years of experience, participants had similar levels of CSEC knowledge before the training and all showed a significant improvement in their knowledge after the training. However, follow-up testing on a smaller subsample demonstrated that knowledge gains were not maintained. The analysis of the participants’ responses to how their behavior would change subsequent to the training revealed important themes including: (1) greater ability to identify/assess or recognize CSEC victims, (2) greater understanding and knowledge of CSEC, (3) increased ability to communicate, interact, and engage with CSEC victims, and (4) heightened desire to educate others and raise awareness about CSEC. Results also indicated that participants were very satisfied with the training and found it highly relevant to their work.  相似文献   
5.
In spring 2006, the United States witnessed immigrant marches throughout the nation. Although Latina/os are often depicted as the “face” of the immigrant marches, we know little about how racial and citizenship statuses shaped Latina/os’ perceptions of how the marches influenced public perceptions of undocumented immigrants. Using logistic regression on data from the 2006 National Survey of Latinos, we find that Latina/os identifying as white are less likely to be supportive of the immigrant marches than those who defied standard racial classifications, and instead identified as “Latina/o.” Moreover, Latina/os who are born in the United States are not as supportive of the immigrant marches in comparison with naturalized citizens and non‐citizen Latina/os, accounting for demographic and human capital factors. This study suggests there is a “racial‐ and citizenship divide” among Latina/os that fragments perceptions on the immigrant mobilizations in the United States.  相似文献   
6.
This study analysed, from a social justice perspective, how students from two Chilean public schools evaluate, legitimise and delegitimise processes and social actors associated with classroom well-being. Using a participatory qualitative design, fifty-nine (59) seventh grade students were asked to take and then select photographs about their school experience, and later participated in semi-structured interviews and a group workshop. Findings regarding the classroom context showed that children legitimised active learning methodologies, teachers to whom they feel close, and the use of technology for learning. They delegitimised punishment and teachers who ignored minority students or those with learning difficulties.  相似文献   
7.
The two paradigms for analyzing immigrant experiences, “assimilationist” and “transnationalist,” leave unanalyzed important differences in immigrant adaptation rooted in different historical generational experiences. This article analyzes the importance of a historically grounded generational frame of analysis. It captures differences in views and involvements between two cohorts of first generation émigrés. Empirically, the study focuses on different Cuban‐American cohort crossborder ties. The first cohort, comprised of émigrés who left between 1959 and 1979 primarily for political reasons, publicly oppose travel to Cuba because they believe it helps sustain a regime they wish to bring to heel. The second cohort, who emigrated largely for economic reasons, is enmeshed in transnational ties that, paradoxically, are unwittingly doing more to transform Cuba than first wave isolationism. The cohort comparison is based on interviews with émigrés in Union City, New Jersey and Miami, Florida. The analysis of effects of transnational ties rests on interviews in Cuba as well.  相似文献   
8.
Objectives. The purpose of this study was to explore generational differences in math/science enrollment and achievement among Mexican‐American students and the role of family and school contexts in these differences. Methods. We applied survey regression techniques to data from 12,020 adolescents in the National Longitudinal Study of Adolescent Health. Results. Native‐born Mexican‐American students had lower math/science enrollment than their peers, especially after differences in family and school contexts were taken into account. Mexican‐American immigrants had lower achievement when enrolled in such classes, but this was explained by their greater level of family and school disadvantages. Conclusions. Persistence and success in the math/science pipeline, a mechanism of social mobility in the modern economy, would likely be enhanced in the fast‐growing population of Mexican‐American students by improvements in family resources and school organization.  相似文献   
9.
ABSTRACT

This article describes a project by the Virtual Teaching and Cyberpsychology Laboratory of the National Autonomous University of Mexico developed to (1) implement a teaching program for clinical psychology students to learn therapeutic skills in providing online psychological services; (2) evaluate the students' acquisition of knowledge and skills in diagnosis via the Internet, case formulation of treatment, and adherence to treatment protocols; and (3) incorporate technologies for creating training settings and online professional services in order to develop the students' clinical competency in this treatment modality. A pilot study was conducted with 17 clinical psychology students in the first phase of the teaching program and 6 students during the second phase. Preliminary results indicate that students increased knowledge of Internet-based clinical interventions and improved in clinical skills. It is necessary to continue the evaluation of the teaching program with larger samples, and further research is suggested.  相似文献   
10.
Journal of Nonverbal Behavior - This article unpacks the basic mechanisms by which paralinguistic features communicated through the voice can affect evaluative judgments and persuasion. Special...  相似文献   
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